Cryogenic liquid intermodal, IMO Type 7 containers are:

Cryogenic liquid intermodal, IMO Type 7 containers are:

• A. Uniform in pressure with a fixed rating
• B. Not pressurized
• C. Pressurized to 50 psi
• D. Diverse in pressure with ratings up to 600

Answer: (D)

Cryogenic liquid intermodal Type 7 containers are designed to carry a variety of cryogenic cargos, so their pressure ratings are not all the same. Different containers in this class are built to different maximum allowable working pressures, depending on the liquid they’re designed to transport and the required venting and safety considerations. Because the vapor pressures of cryogenic liquids and the boil-off rates can vary significantly, the fleet includes containers with a range of pressure ratings, up to as high as 600 psi in some designs. That variability is why the statement describing them as diverse in pressure with ratings up to 600 is the best fit. The other options imply a single fixed or zero pressure, which doesn’t reflect how these containers are designed to accommodate multiple cryogenic cargos and their differing venting needs.

Cryogenic liquid intermodal Type 7 containers are designed to carry a variety of cryogenic cargos, so their pressure ratings are not all the same. Different containers in this class are built to different maximum allowable working pressures, depending on the liquid they’re designed to transport and the required venting and safety considerations. Because the vapor pressures of cryogenic liquids and the boil-off rates can vary significantly, the fleet includes containers with a range of pressure ratings, up to as high as 600 psi in some designs. That variability is why the statement describing them as diverse in pressure with ratings up to 600 is the best fit. The other options imply a single fixed or zero pressure, which doesn’t reflect how these containers are designed to accommodate multiple cryogenic cargos and their differing venting needs.